foot-candle to lux | Exact Decimal + Formula

1 Foot-candle = 10.76391 Lux

Foot-candles to lux is used by lighting designers and photographers to translate US lighting requirements into metric values.

About Foot-candle and Lux

Foot-candle (fc)

A foot-candle is one lumen per square foot, about 10.764 lux.

Where it's used: Architectural lighting design in the United States.

Lux (lx)

Lux is the SI unit of illuminance — one lumen per square meter.

Where it's used: Office and studio lighting requirements; a well-lit office is around 500 lux.

Illumination Converter

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Precision

Formula

lx = fc × 10.76391

To convert Foot-candle to Lux, use the formula displayed above.

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Foot-candle to Lux: Quick Reference Table

Foot-candle	Lux (Decimal)	Fraction	Real-world equivalent
0.001 fc	0.010764 lx	-	fractional unit measurement
0.01 fc	0.107639 lx	-	fractional unit measurement
0.1 fc	1.076391 lx	-	standard single unit scale
0.5 fc	5.381955 lx	-	standard single unit scale
1 fc	10.76391 lx	-	multiple unit increments
2 fc	21.52782 lx	-	multiple unit increments
5 fc	53.81955 lx	-	multiple unit increments
10 fc	107.6391 lx	-	multiple unit increments
25 fc	269.09775 lx	-	multiple unit increments
50 fc	538.1955 lx	-	multiple unit increments
100 fc	1076.391 lx	-	multiple unit increments
250 fc	2690.9775 lx	-	multiple unit increments
500 fc	5381.955 lx	-	multiple unit increments
1000 fc	10763.91 lx	-	multiple unit increments

fc to lx Formula and Examples

Direct Formula lx = fc × 10.76391

Inverse Formula fc = lx × 0.092903

Mental Math Shortcut

Multiply the value by roughly 10.8 to calculate the equivalent amount in your head.

Common Foot-candle to Lux Calculations

5 fc = 53.81955 lx
10 fc = 107.6391 lx
50 fc = 538.1955 lx
100 fc = 1076.391 lx
500 fc = 5381.955 lx

Precision & Practical Use

For example, 10 fc = 107.6391 lx — roughly multiple unit increments.

Results are computed to up to 9 decimal places. Round to the precision of your measuring instrument — for most illumination applications, 2–3 significant figures are plenty.

How to Convert Foot-candle to Lux

How many luxes are in one foot-candle?

One Foot-candle (fc) equals 10.76391 Lux (lx). To convert foot-candles to luxes, multiply the foot-candle value by 10.76391.

How do I convert Foot-candle to Lux?

Multiply your foot-candle value by 10.76391 to get the result in Lux: lx = fc × 10.76391. For example, 5 fc = 53.81955 lx.

What is the formula for converting fc to lx?

The conversion formula is lx = fc × 10.76391. Use the calculator above for any value, and see the reference table below for common inputs from 0.001 to 1000.

Is there a quick mental estimate for fc to lx?